From a report in Fortune magazine:
Ford Motor Co on Tuesday scrapped a planned Mexican car factory and added 700 jobs in Michigan following criticism by Donald Trump, as the U.S. president-elect turned his attention toward rival General Motors Co with the threat of a "big border tax" over compact cars made in Mexico.
Ford CEO Mark Fields called the move "a vote of confidence" in Trump, but primarily a response to a decline in North American demand for small cars like those that would have been made at the Mexican plant. He said Ford would have made the same decision even if Trump had not been elected.
Scrapping the Mexican car factory may indirectly be a way Mexico actually will pay for the fence.